FocusRequesterRestore

requester.kt

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.OutlinedTextField
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.focus.FocusRequester
import androidx.compose.ui.focus.focusRequester
import androidx.compose.ui.text.TextRange
import androidx.compose.ui.text.input.TextFieldValue
import com.example.outlinedtextfieldtest.ui.theme.OutlinedTextFieldTestTheme

class MainActivity : ComponentActivity() {

    private var content: Content = Content("Initial text")

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            Screen(content) {
                content = it
            }
        }
    }
}


@Composable
private fun Screen(content: Content, onTextChanged: (Content) -> Unit) {
    OutlinedTextFieldTestTheme {
        val focusRequester = remember { FocusRequester() }
        var localText by rememberSaveable(content, stateSaver = TextFieldValue.Saver) {
            mutableStateOf(
                TextFieldValue(
                    text = content.text,
                    selection = TextRange(content.text.length)
                )
            )
        }
        OutlinedTextField(
            modifier = Modifier.focusRequester(focusRequester),
            value = localText,
            onValueChange = {
                localText = it
                onTextChanged(Content(it.text))
            },
        )
        LaunchedEffect(focusRequester) {
            focusRequester.requestFocus()
        }
    }
}

data class Content(val text: String)